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Load transient response enhancement method and system for voltage-mode buck converter

A step-down converter and transient response technology, applied to output power conversion devices, conversion equipment without intermediate conversion to AC, electrical components, etc., can solve the problems of small load changes and difficulty in meeting design requirements, and achieve Fast response, improved load transient response capability, and improved effect of poor load transient response

Active Publication Date: 2017-05-03
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The traditional step-down converter can output a stable voltage, which can meet the application scenarios where the load changes little or relatively slowly; when the load changes rapidly or the subsequent stage has high requirements for voltage stability, the traditional structure is difficult to meet the design requirements. It is necessary to change the structure or add additional circuits to enhance the load response capability

Method used

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  • Load transient response enhancement method and system for voltage-mode buck converter
  • Load transient response enhancement method and system for voltage-mode buck converter
  • Load transient response enhancement method and system for voltage-mode buck converter

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Embodiment Construction

[0047]In the embodiment of the present invention, after the output voltage Vout of the voltage-mode step-down converter is low-pass filtered, an average voltage Vout1 is generated; the difference between Vout and Vout1 is calculated, and the amplitude waveform of the obtained difference is converted The fluctuating current Itran is obtained; ramp processing is performed on the amplitude of the fluctuating current Itran, and the transient response output voltage Vout of the voltage-mode step-down converter is generated according to the obtained ramp signal.

[0048] Here, performing ramp processing to generate the transient response output voltage Vout of the voltage-mode step-down converter includes: first performing ramp processing on the amplitude of the fluctuating current Itran to generate a feedback tooth voltage Vramp; and then according to the feedback tooth voltage Vramp The pulse width within a unit period is modulated to generate the transient response output voltage ...

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Abstract

The invention discloses a load transient response enhancement method for a voltage-mode buck converter. The method comprises the steps that low-pass filtering is carried out on the output voltage Vout of the voltage-mode buck converter to produce average voltage Vout1; the difference between Vout and Vout1 is calculated, and the amplitude waveform of the calculated difference is converted to acquire ripple current Itran; and the amplitude of the ripple current Itran is ramped, and the transient response output voltage Vout of the voltage-mode buck converter is generated according to an acquired ramp signal. The invention further discloses a load transient response enhancement system for the voltage-mode buck converter.

Description

technical field [0001] The invention relates to circuit electronics technology, in particular to a load transient response enhancement method and system of a voltage-mode step-down converter. Background technique [0002] With the rapid development of various electronic product markets, the power chip technology that can provide stable voltage for electronic products is also constantly improving. The load of the power chip is various, and the load size change is inevitable. The load transient response time and ability have become the key technical indicators to measure the quality of the power chip. In order to ensure the precision range of the output voltage of the power chip, the power chip needs to have a good load transient response capability. [0003] Buck converters are mainly used in scenarios where the input voltage is relatively high and the output voltage is relatively low. The general-purpose voltage-mode buck converter is mainly composed of oscillator, ramp ge...

Claims

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Application Information

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IPC IPC(8): H02M3/10
CPCH02M3/10H02M1/0019H02M3/156
Inventor 耿玮生
Owner SANECHIPS TECH CO LTD